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/Documentation/userspace-api/netlink/
Dc-code-gen.rst1 .. SPDX-License-Identifier: BSD-3-Clause
9 allowed in older families by the ``genetlink-c`` protocol level,
13 objects by the object type. For example ``$attr`` is the value
17 The upper case is used to denote literal values, e.g. ``$family-CMD``
22 and with dashes (``-``) replaced by underscores (``_``).
25 appended (``do`` -> ``do_``).
30 ``c-family-name`` controls the name of the ``#define`` for the family
31 name, default is ``$family-FAMILY-NAME``.
33 ``c-version-name`` controls the name of the ``#define`` for the version
34 of the family, default is ``$family-FAMILY-VERSION``.
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Dspecs.rst1 .. SPDX-License-Identifier: BSD-3-Clause
17 - the C uAPI header
18 …- documentation of the protocol as a ReST file - see :ref:`Documentation/networking/netlink_spec/i…
19 - policy tables for input attribute validation
20 - operation tables
25 See :doc:`intro-specs` for a practical starting guide.
28 ``((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)``
35 by new families to the most complex covering all the quirks of the old ones.
40 - ``genetlink`` - most streamlined, should be used by all new families
41 - ``genetlink-c`` - superset of ``genetlink`` with extra attributes allowing
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/Documentation/devicetree/bindings/dma/
Drenesas,nbpfaxi.txt1 * Renesas "Type-AXI" NBPFAXI* DMA controllers
7 - compatible: must be one of
17 - #dma-cells: must be 2: the first integer is a terminal number, to which this
21 #define NBPF_SLAVE_RQ_HIGH 1
22 #define NBPF_SLAVE_RQ_LOW 2
23 #define NBPF_SLAVE_RQ_LEVEL 4
26 - max-burst-mem-read: limit burst size for memory reads
28 than using the maximum burst size allowed by the hardware's buffer size.
29 - max-burst-mem-write: limit burst size for memory writes
31 than using the maximum burst size allowed by the hardware's buffer size.
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Dsnps,dma-spear1340.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/dma/snps,dma-spear1340.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Viresh Kumar <vireshk@kernel.org>
11 - Andy Shevchenko <andriy.shevchenko@linux.intel.com>
14 - $ref: dma-controller.yaml#
19 - const: snps,dma-spear1340
20 - items:
21 - enum:
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/Documentation/scheduler/
Dsched-pelt.c6 * C program (compile with -lm)
13 #define HALFLIFE 32
14 #define SHIFT 32
23 /* To silence -Wunused-but-set-variable warnings. */ in calc_runnable_avg_yN_inv()
26 x = ((1UL<<32)-1)*pow(y, i); in calc_runnable_avg_yN_inv()
55 int n = -1;
57 long max = 1024; variable
61 long last = 0, y_inv = ((1UL<<32)-1)*y; in calc_converged_max()
64 if (n > -1) in calc_converged_max()
65 max = ((max*y_inv)>>SHIFT) + 1024; in calc_converged_max()
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Dsched-deadline.rst12 3. Scheduling Real-Time Tasks
18 4.1 System-wide settings
33 system behavior. As for -rt (group) scheduling, it is assumed that root users
50 ------------------
70 with the "traditional" real-time task model (see Section 3) can effectively
76 - Each SCHED_DEADLINE task is characterized by the "runtime",
79 - The state of the task is described by a "scheduling deadline", and
82 - When a SCHED_DEADLINE task wakes up (becomes ready for execution),
86 ---------------------------------- > ---------
87 scheduling deadline - current time period
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/Documentation/netlink/
Dgenetlink-c.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
3 ---
4 $id: http://kernel.org/schemas/netlink/genetlink-c.yaml#
5 $schema: https://json-schema.org/draft-07/schema
12 len-or-define:
14 pattern: ^[0-9A-Za-z_-]+( - 1)?$
16 len-or-limit:
17 # literal int or limit based on fixed-width type e.g. u8-min, u16-max, etc.
19 pattern: ^[su](8|16|32|64)-(min|max)$
26 required: [ name, doc, attribute-sets, operations ]
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Dgenetlink-legacy.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
3 ---
4 $id: http://kernel.org/schemas/netlink/genetlink-legacy.yaml#
5 $schema: https://json-schema.org/draft-07/schema
12 len-or-define:
14 pattern: ^[0-9A-Za-z_-]+( - 1)?$
16 len-or-limit:
17 # literal int or limit based on fixed-width type e.g. u8-min, u16-max, etc.
19 pattern: ^[su](8|16|32|64)-(min|max)$
26 required: [ name, doc, attribute-sets, operations ]
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Dnetlink-raw.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
3 ---
4 $id: http://kernel.org/schemas/netlink/netlink-raw.yaml#
5 $schema: https://json-schema.org/draft-07/schema
12 len-or-define:
14 pattern: ^[0-9A-Za-z_-]+( - 1)?$
21 required: [ name, doc, attribute-sets, operations ]
31 enum: [ netlink-raw ] # Trim
32 # Start netlink-raw
34 description: Protocol number to use for netlink-raw
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Dgenetlink.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
3 ---
4 $id: http://kernel.org/schemas/netlink/genetlink-legacy.yaml#
5 $schema: https://json-schema.org/draft-07/schema
12 len-or-define:
14 pattern: ^[0-9A-Za-z_-]+( - 1)?$
16 len-or-limit:
17 # literal int or limit based on fixed-width type e.g. u8-min, u16-max, etc.
19 pattern: ^[su](8|16|32|64)-(min|max)$
26 required: [ name, doc, attribute-sets, operations ]
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/Documentation/driver-api/media/drivers/ccs/
Dmk-ccs-regs1 #!/usr/bin/perl -w
2 # SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause
3 # Copyright (C) 2019--2020 Intel Corporation
8 my $ccsregs = "ccs-regs.asc";
28 $0 - Create CCS register definitions for C
30 usage: $0 -c ccs-regs.asc -e header -r regarray -l limit-c -L limit-header [-k]
32 -c ccs register file
33 -e header file name
34 -r register description array file name
35 -l limit and capability array file name
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/Documentation/netlink/specs/
Dtcp_metrics.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
5 protocol: genetlink-legacy
10 c-family-name: tcp-metrics-genl-name
11 c-version-name: tcp-metrics-genl-version
12 max-by-define: true
13 kernel-policy: global
16 -
17 name: tcp-fastopen-cookie-max
21 attribute-sets:
22 -
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Dfou.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
5 protocol: genetlink-legacy
8 Foo-over-UDP.
10 c-family-name: fou-genl-name
11 c-version-name: fou-genl-version
12 max-by-define: true
13 kernel-policy: global
16 -
19 name-prefix: fou-encap-
20 enum-name:
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/Documentation/admin-guide/
Dcputopology.rst8 Documentation/ABI/stable/sysfs-devices-system-cpu.
10 Architecture-neutral, drivers/base/topology.c, exports these attributes.
15 For an architecture to support this feature, it must define some of
16 these macros in include/asm-XXX/topology.h::
18 #define topology_physical_package_id(cpu)
19 #define topology_die_id(cpu)
20 #define topology_cluster_id(cpu)
21 #define topology_core_id(cpu)
22 #define topology_book_id(cpu)
23 #define topology_drawer_id(cpu)
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Dxfs.rst1 .. SPDX-License-Identifier: GPL-2.0
8 on the SGI IRIX platform. It is completely multi-threaded, can
15 for further details. This implementation is on-disk compatible
25 Sets the buffered I/O end-of-file preallocation size when
28 through to 1GiB, inclusive, in power-of-2 increments.
30 The default behaviour is for dynamic end-of-file
40 on-disk. When the new form is used for the first time when
42 attributes) the on-disk superblock feature bit field will be
45 The default behaviour is determined by the on-disk feature
48 by the filesystem.
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/Documentation/ABI/testing/
Dsysfs-class-powercap4 Contact: linux-pm@vger.kernel.org
13 Contact: linux-pm@vger.kernel.org
22 Contact: linux-pm@vger.kernel.org
30 Contact: linux-pm@vger.kernel.org
35 E.g. intel-rapl:0:1:1.
40 Contact: linux-pm@vger.kernel.org
51 Contact: linux-pm@vger.kernel.org
58 Contact: linux-pm@vger.kernel.org
60 Current energy counter in micro-joules. Write "0" to reset.
62 read-only.
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Dsysfs-class-hwmon16 The contents of the label are free-form.
52 Voltage max value.
60 Voltage critical max value.
83 This varies by chip and by motherboard.
85 by the chip driver, and must be done by the application.
135 this voltage channel is being used for, and user-space
136 doesn't. In all other cases, the label is provided by
137 user-space.
145 When disabled the sensor read will return -ENODATA.
147 - 1: Enable
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/Documentation/devicetree/bindings/regulator/
Dlp872x.txt4 - compatible: "ti,lp8720" or "ti,lp8725"
5 - reg: I2C slave address. 0x7d = LP8720, 0x7a = LP8725
8 - ti,general-config: the value of LP872X_GENERAL_CFG register (u8)
10 bit[2]: BUCK output voltage control by external DVS pin or register
12 bit[1]: sleep control by external DVS pin or register
20 bit[2]: BUCK1 output voltage control by external DVS pin or register
27 - ti,update-config: define it when LP872X_GENERAL_CFG register should be set
28 - ti,dvs-gpio: GPIO specifier for external DVS pin control of LP872x devices.
29 - ti,dvs-vsel: DVS selector. 0 = SEL_V1, 1 = SEL_V2.
30 - ti,dvs-state: initial DVS pin state. 0 = DVS_LOW, 1 = DVS_HIGH.
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/Documentation/core-api/
Dnetlink.rst1 .. SPDX-License-Identifier: BSD-3-Clause
13 ---------------
15 Older families often define "null" attributes and commands with value
21 -------------
31 ---------------
44 ----------
51 ------------------------
54 them - make sure to report dump inconsistency with ``NLM_F_DUMP_INTR``.
55 This is usually implemented by maintaining a generation id for the
65 -------
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/Documentation/devicetree/bindings/spi/
Dspi-controller.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/spi/spi-controller.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Mark Brown <broonie@kernel.org>
20 pattern: "^spi(@.*|-([0-9]|[1-9][0-9]+))?$"
22 "#address-cells":
25 "#size-cells":
28 cs-gpios:
32 increased automatically with max(cs-gpios, hardware chip selects).
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/Documentation/networking/
Dpacket_mmap.rst1 .. SPDX-License-Identifier: GPL-2.0
22 - Ulisses Alonso Camaró <uaca@i.hate.spam.alumni.uv.es>
23 - Johann Baudy
38 highest bandwidth. By using a shared buffer between the kernel and the user
47 supported by devices of your network. CPU IRQ pinning of your network interface
67 [setup] socket() -------> creation of the capture socket
68 setsockopt() ---> allocation of the circular buffer (ring)
70 mmap() ---------> mapping of the allocated buffer to the
73 [capture] poll() ---------> to wait for incoming packets
75 [shutdown] close() --------> destruction of the capture socket and
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/Documentation/devicetree/bindings/net/
Dethernet-controller.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/net/ethernet-controller.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - David S. Miller <davem@davemloft.net>
19 local-mac-address:
22 $ref: /schemas/types.yaml#/definitions/uint8-array
26 mac-address:
28 Specifies the MAC address that was last used by the boot
30 to the device by the boot program is different from the
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/Documentation/sound/designs/
Dtimestamping.rst7 - Trigger_tstamp is the system time snapshot taken when the .trigger
8 callback is invoked. This snapshot is taken by the ALSA core in the
11 estimate with a delay. In the latter two cases, the low-level driver
17 - tstamp is the current system timestamp updated during the last
19 The difference (tstamp - trigger_tstamp) defines the elapsed time.
29 - ``avail`` reports how much can be written in the ring buffer
30 - ``delay`` reports the time it will take to hear a new sample after all
42 of time as measured by different components of audio hardware. In
43 ascii-art, this could be represented as follows (for the playback
47 --------------------------------------------------------------> time
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/Documentation/hwmon/
Dw83793.rst10 Addresses scanned: I2C 0x2c - 0x2f
15 - Yuan Mu (Winbond Electronics)
16 - Rudolf Marek <r.marek@assembler.cz>
20 -----------------
36 -----------
44 sets of 6-pin CPU VID input.
48 voltage0-2 is 2mV, resolution of voltage3/4/5 is 16mV, 8mV for voltage6,
49 24mV for voltage7/8. Temp1-4 have a 0.25 degree Celsius resolution,
50 temp5-6 have a 1 degree Celsiis resolution.
53 Temp1-4 have 2 possible types. It can be read from (and written to)
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/Documentation/devicetree/bindings/firmware/
Darm,scmi.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Sudeep Holla <sudeep.holla@arm.com>
15 that are provided by the hardware platform it is running on, including power
18 This binding is intended to define the interface the firmware implementing
26 - $ref: /schemas/firmware/nxp,imx95-scmi.yaml
34 - description: SCMI compliant firmware with mailbox transport
36 - const: arm,scmi
37 - description: SCMI compliant firmware with ARM SMC/HVC transport
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